--- substr.h.orig	Thu May 13 10:58:18 2004
+++ substr.h	Tue Jun  1 17:31:18 2004
@@ -2,6 +2,7 @@
 #ifndef _substr_h
 #define _substr_h
 
+#include <sys/types.h>
 #include <iostream>
 #include "basics.h"